package com.itheima.reggie.common;

import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;

import java.sql.SQLIntegrityConstraintViolationException;

/**
 * 全局异常处理
 */
//@ControllerAdvice用来指定拦截哪些Controller
@ControllerAdvice(annotations = {RestController.class, Controller.class})
//最终的方法数据需要返回json数据，@ResponseBody能够把结果封装成json数据返回
@ResponseBody
@Slf4j
public class GlobalExceptionHandler {
    /**
     * 异常处理方法
     * @param ex
     * @return
     */
    //@ExceptionHandler用来指定方法用来处理哪些异常
    @ExceptionHandler(SQLIntegrityConstraintViolationException.class)//处理数据库抛出的异常
    public R<String> exceptionHandler(SQLIntegrityConstraintViolationException ex){
        log.error(ex.getMessage());
        if(ex.getMessage().contains("Duplicate entry")){
            String[] split = ex.getMessage().split(" ");//通过空格隔开
            String msg = split[2] + "已存在";
            return R.error(msg);
        }
        return R.error("未知错误");
    }
    @ExceptionHandler(CustomException.class)//处理数据库抛出的异常
    public R<String> exceptionHandler(CustomException ex){
        log.error(ex.getMessage());
        return R.error(ex.getMessage());
    }
}
